Line conditioning was still advantageous in our 75 year old farmhouse containing antique wiring & no ground lines. I use Chang Lightspeeds which also provide integral surge protection; the "third leg" path to ground is 'basically' there via the grounded-conduit itself (it's not as good as a third-wire ground connection but is better than nothing). So if you at least have conduit, BX, or Greenfield then there is likely a metallic ground path from the metal outlet boxes back to the service panel. You can take advantage of that ground path by simply installing three-prong outlets, which connect the 'conduit ground' to the outlet's ground-prong via the metal outlet mounting flanges. Use a high grade outlet for the audio of course.
Plugging amps direct into the line, or via a conditioner, is an old debate. My results vary depending upon the amp in use & the upgrade AC cord in use. For amps that work well with a filtered upgrade AC cord, I plug them directly to line (the filtering is in the cord). For amps that work well with unfiltered upgrade cords I plug them into a 'Chang 9900 Amp' (has 30 amp capacity = low surge impedance). The Chang was plugged into the house wiring; later when I added a dedicated line I plug the Chang into that instead with good results.
For source components I have a Chang 3200 (15 amp capacity) which provides simultaneous filtering & transient protection. I also use upgrade AC cords on source components, each cord selected for best results with each specific component.
The PS Audio may also do a good job for you, but the only way to find out is by trial & error. I don't personally care for their inefficiency; much wasted power & much extra heat in your room (this makes you not even want to have your system turned on during hot weather & also significantly increases cooling bills during air conditoner season).
Further down the road I installed the dedicated line, which further enhanced all the previous improvements. Having a dedicated line doesn't mean that you do not need line conditioning; having line conditioning doesn't mean that you won't benefit from a dedicated line. They're each helpful standalone, & they're even better when combined.
Plugging amps direct into the line, or via a conditioner, is an old debate. My results vary depending upon the amp in use & the upgrade AC cord in use. For amps that work well with a filtered upgrade AC cord, I plug them directly to line (the filtering is in the cord). For amps that work well with unfiltered upgrade cords I plug them into a 'Chang 9900 Amp' (has 30 amp capacity = low surge impedance). The Chang was plugged into the house wiring; later when I added a dedicated line I plug the Chang into that instead with good results.
For source components I have a Chang 3200 (15 amp capacity) which provides simultaneous filtering & transient protection. I also use upgrade AC cords on source components, each cord selected for best results with each specific component.
The PS Audio may also do a good job for you, but the only way to find out is by trial & error. I don't personally care for their inefficiency; much wasted power & much extra heat in your room (this makes you not even want to have your system turned on during hot weather & also significantly increases cooling bills during air conditoner season).
Further down the road I installed the dedicated line, which further enhanced all the previous improvements. Having a dedicated line doesn't mean that you do not need line conditioning; having line conditioning doesn't mean that you won't benefit from a dedicated line. They're each helpful standalone, & they're even better when combined.